Selection paradigm for displayed user interface

ABSTRACT

A moveable displayed user interface element can be used to select an item displayed on a user interface. Once the proper item or items are selected, an area of the moveable displayed user interface element can be activated to perform an operation on the selected item or items. The moveable displayed user interface element can additionally display information about a selected item, and, in some cases, the displayed information can be edited to modify the selected item. A versatile lightweight system can be used to determine when a moveable object is over any of a number of regions associated with specified targets. The lightweight system can be used to implement moveable displayed user interface elements.

TECHNICAL FIELD

The invention relates to computer user interfaces, and more particularly to a displayed user interface element moveable about a display.

BACKGROUND OF THE INVENTION

Since the development of the first computer systems, a variety of techniques have been set forth to help human users interface with machines. The science of user interfaces is sometimes called human-computer interaction (“HCI”). Many early systems were based on the exchange of text, such as ASCII characters typed at a keyboard. However, such text-based systems were hampered by a variety of limitations. With the advent of more powerful desktop computers, graphical user interfaces (GUIs) emerged as a superior user interface paradigm and have become more prevalent.

One familiar user interface paradigm presented by many contemporary desktop computers includes windows, icons, menus, and a pointer; it is therefore sometimes called the “WIMP” user interface. Such an interface can be used in a variety of systems for a variety of purposes and is familiar to most contemporary computer users. A typical aspect of the conventional WIMP user interface is the presentation of icons, which can be selected via a pointer. The pointer is manipulated with a pointer manipulation device, such as a mouse or trackball.

However, the conventional WIMP user interface is also hampered by various limitations, and it is not always readily understood by new users. Therefore, there exists a need for better techniques for users to interact with computers.

SUMMARY OF THE INVENTION

The invention includes methods and systems relating to various ways of selecting an item presented on a display and performing an operation on the selected item. For example, a user interface element can be moved about a user interface to select a displayed item. Once the proper item or items are selected, an area on the user interface element can be activated to perform an operation on the selected item or items. The user interface element provides an intuitive and easy-to-use user interface paradigm that can be used on its own or incorporated into other interfaces, such as the conventional WIMP interface.

In one set of embodiments, various user interface elements are provided for performing various operations on displayed items. For example, displayed items can be modified, relocated, or deleted. The user interface element can be moved about the display to select appropriate displayed items. Once the user is satisfied with the selection, she can activate an area displayed within the user interface element to activate the desired function, which is performed on the selection.

In another feature of the invention, the user interface element can be dynamically updated to present information associated with selected items. Such information can be presented before the desired function is activated and in some cases may be edited. For example, properties of a selected item can be presented in a text box, and the properties can be changed by editing the text in the text box.

The described user interface elements are particularly useful in client-server scenarios such as web browsers. For example, a user can edit or customize a web page by using a combination of the user interface elements.

The described user interface elements can be implemented via a described mechanism for indicating when an item has been moved over any of a number of specified regions, which are associated with targets. The mechanism can be extended for use in a variety of situations, including client-server scenarios.

Additional features and advantages of the invention will be made apparent from the following detailed description of illustrated embodiments, which proceeds with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is an illustration of an exemplary user interface element in accordance with the invention.

FIGS. 1B and 1C are illustrations of alternative arrangements of user interface elements in accordance with the invention.

FIG. 2 is a flowchart showing an exemplary method for use with the user interface elements in accordance with the invention.

FIG. 3 shows a display region showing various displayed items.

FIG. 4 shows the display region of FIG. 3 and a user interface element for selecting a displayed item.

FIG. 5 is a display region showing a list.

FIG. 6 is a display region showing a user interface element for deleting one of the columns in a list, such as that of FIG. 5.

FIG. 7A is an illustration of a user interface element for renaming a column in a list.

FIG. 7B is an illustration of a user interface element for moving a column in a list.

FIG. 8A is an illustration of a user interface element for deleting a column.

FIG. 8B is an illustration of a user interface element for formatting a column.

FIG. 9 is a block diagram of a system for determining when a moveable displayed item is positioned over any of a set of targets.

FIG. 10 is a flowchart showing an exemplary method for use in determining when a moveable displayed item is positioned over any of a set of targets.

FIG. 11 is a block diagram showing an exemplary environment for implementing the described user interface elements.

FIG. 12 is a block diagram showing an exemplary implementation of the described user interface elements in a DHTML environment.

DETAILED DESCRIPTION OF THE INVENTION

The invention is directed to methods and systems related to providing a user interface paradigm. In one embodiment illustrated herein, the invention is used in conjunction with MSN Web Communities provided on the Internet by Microsoft Corporation of Redmond, Wash. Briefly described, Web Communities are a collection of online locations where persons with similar interests can meet and exchange a variety of information.

Exemplary User Interface Elements

FIGS. 1A-1C show a variety of exemplary moveable displayed user interface elements that can be used to select a set of one or more items and perform an operation on the selected items upon activation of an area on the user interface element.

The illustrated user interface elements can be used in an environment having a displayed user interface, such as a graphical user interface of a desktop computer. For example, FIG. 1A shows a basic user interface element 102 with a pointer 112 and a pushbutton 114. Displayed items can be selected by moving the pointer 112 over an item. After the item is selected, the pushbutton 114 can be activated to perform an operation on the selected item.

Typically, items are unselected when the pointer 112 is moved off the item. Alternatively, items can be unselected when the pointer 112 is moved to another item, or multiple items can be selected in some implementations by moving the pointer 112 over them in turn. To give the user an indication that an item is selected, typically, selected items are portrayed in some emphasized manner (e.g., the item is highlighted).

The shape of the user interface element 102 can vary from that shown. Although the example shown is substantially rectangular, other shapes (e.g., triangular, circular, and the like) can be used.

The user interface element 102 can be moved in a variety of ways. Typically, the element is moved by dragging it (e.g., positioning a graphical pointer over the item in a graphical user interface, clicking a pointing device button, and then moving the graphical pointer with the pointing device) about a displayed area. The element 102 can also be moved via keyboard commands (e.g., up, down, left, and right arrow keys), and, in some cases, the user interface element can be designated as the pointer in a graphical user interface. In such a case, the user interface element 102 is moved simply by manipulating a keyboard or pointing device. The pointing device used to move the element 102 can be any of a number of devices, such as a mouse, trackball, or keypad.

The manner in which selection of displayed items is achieved can also vary from that shown. Although the example achieves selection by positioning the pointer 112 over an item, other methods (e.g., positioning any portion of the element 102 over an item) can be used.

In some alternatives, the keyboard can be used in a variety of ways to position the element 102. For example, in addition to using the arrow keys, the element 102 can be navigated to a number of pre-defined possible positions (or “hot spots”) by pressing the tab or some other (e.g., shift tab or enter) key. Another key on the keyboard can be designated for activation (e.g., the enter key).

Although not required, a helpful feature is a description of the action performed when the button 114 is pressed. The description can be displayed anywhere, such as within the user interface element or within the button 114. The description can be a text description (e.g., “delete”) or some other description (e.g., an icon or other graphic). The description could also be implicit by using various colored elements (e.g., red for delete) or some other indication.

Presentation of such a description is helpful because the user is informed of the action about to be performed. Thus, for example, some operations (e.g., deletes) need not be explicitly confirmed (e.g., no separate alert need be provided). Confirmation can be built in to the user interface element via the description. The moveable displayed user interface element can thus avoid the error-prone approach of selecting an item without having the operation in mind.

In some arrangements, having a description serves as a proxy for having a separate confirmation step. For example, in some conventional systems, a delete function is selected and a confirmation dialog box is displayed with buttons for “yes” and “no,” requiring another action by the user. Confirmation can be avoided if the function (e.g., “delete”) is plainly described within the element 102. Such arrangements are thus often more efficient and less prone to confusion and error.

Finally, the manner in which performance of an operation is initiated on the selected displayed items can also vary from that shown. Although a displayed button 114 is shown, other user interface mechanisms (e.g., a checkbox or slider) can be used.

Another example of a user interface element 122 for selecting an item and performing an operation on the item is shown in FIG. 1B. The user interface element 122 includes a separate drag area 126, via which the element 124 can be dragged about a display.

Still another example of a user interface element 132 for selecting an item and performing an operation on the item is shown in FIG. 1C. The element 132 includes a name area 134, which can be used to display the type of function performed by the user interface element 132. Such an arrangement can be particularly useful, for example, in scenarios utilizing multiple user interface elements performing a variety of operations. Displaying a name of the user interface element 132 can assist the user in differentiating which of the user interface elements is displayed.

Also included within the exemplary user interface element 132 is a text box 136. Such an arrangement can be particularly useful, for example, in displaying information about a selected item (e.g., the selected item's name). In some cases, it may be desirable to allow editing of the information displayed in the text box 136 (e.g., to change a selected item's name). In addition to or instead of a text box 136, any of a variety of other user interface elements (e.g., push buttons, radio buttons, toggle buttons, check boxes, combo boxes, drop down menus, sliders, rulers, and the like) can be used alone or in various combinations within the user interface element.

In the illustrated example, the button 138 is used to initiate performance of an action on a selected item. After the action is performed, the user interface element can remain on the display for further operations or disappear.

Although the illustrated examples describe selection with respect to a single item, a user interface element can also be constructed to select multiple items. In addition, some operations may require multiple steps. Various examples of moveable displayed user interface elements are illustrated in further detail below.

Exemplary Method for Use in Conjunction with User Interface Element

FIG. 2 shows an exemplary method for use in conjunction with a user interface element such as that of FIG. 1A. Typically, software is provided for activating or creating an instance of the user interface element, at which time the method begins.

At 202, the user interface element is displayed. Then, at 212, it is determined if the user interface element is pointing to an item (e.g., whether the pointer 112 of FIG. 1A is over an item). If so, the item is selected at 214. When the item is selected, a variety of other actions can be initiated. For example, the item can be highlighted (e.g., by changing its color, bolding the item, or the like) to provide feedback to the user, indicating the item is selected. Further, information about the selected item can be displayed in the user interface element. In some cases, there may be a level of indirection between the displayed item and the selected item. For example, the displayed item may be the word “all,” and selecting the item selects all items. Or the displayed item may be the word “spell check,” and selecting the item selects a spell check function.

If it is detected that the user interface element is to be moved at 222 (e.g., via manipulation of a pointing device), the user interface element is repositioned on the display at 224. It is then again determined whether the user interface element is pointing to an item at 212 and appropriate action taken.

If activation of the activation area (e.g., pushbutton) of the user interface element is detected at 232, performance of a particular operation on the selected item is initiated at 242. The operation can be any of a wide variety of actions or functions. For example, if the items represent documents, the operations can be “edit,” “delete,” or “rename” operations. If the items represent merchandise, the operations can be “get information” or “buy” operations. If the items are columns in a table, the operations can be “modify,” “rename,” “delete,” “format,” “add,” or “move” operations.

Exemplary Operation of a User Interface Element

FIGS. 3 and 4 show exemplary operation of a user interface element to select an item and perform an operation on the selected item.

FIG. 3 depicts a display area 300 of a user interface, such as a window in a computer's graphical user interface. The display area can also be depicted on a variety of other user interfaces, such as that presented by a television or hand-held device. Four items 304, 306, 308, and 312 are shown. The items can be used, for example, to represent abstract or real-world items.

At FIG. 4, a user interface element 422 is shown and has been moved about the display area to select the item 412, which is depicted as highlighted to indicate it has been selected. Upon activation of the area 428, an operation is performed on the selected item 412.

Exemplary Scenario for User Interface Element

FIGS. 5 and 6 illustrate an exemplary scenario for a user interface element. FIG. 5 shows a display area 502 that includes a list of videos as part of an online community devoted to a particular film genre. Two exemplary items 512 and 518 are columns in the list, which is presented as a table. Various user interface elements for performing operations on the list can be invoked by activating the appropriate area in the display area 502 (e.g., “Delete Column”).

FIG. 6 shows use of a user interface element 622 in a display area 602. The user interface element 622 has been positioned by using a pointer 640 to drag (via the area 624) the element 622 to select the column 612, which is shown as highlighted to indicate it has been selected. Upon activation of the pushbutton 628, the column 612 is deleted.

Exemplary Types of User Interface Elements

FIGS. 7A, 7B, 8A, and 8B show a variety of types of user interface elements that can be applied, for example, for use in the scenario depicted in FIGS. 5 and 6.

FIG. 7A shows a rename user interface element 700. The user interface element can be identified by its name area 714. When the pointer 712 is positioned over a column, the text box 716 is updated to indicate the name of the column.

When the user is satisfied that the proper column has been selected and has changed the contents of the text box 716 to be the desired name of the proper column, the user can click on the rename pushbutton 718 to rename the column.

Two other buttons, a cancel button 720 and a help button 722 are provided. The cancel button dismisses the user interface element, and the help button provides further information to assist in operation of the user interface element.

FIG. 7B shows a move column user interface element 750. The user interface element 750 can be used to move a column left or right by positioning the pointer 752 over the desired column and then activating the move left area 754A or the move right area 754B. The user interface element 750 can be configured to automatically move with the column. For example, if the column is moved to the left, the user interface element 750 automatically tracks the column and moves to the left with the column. The user interface element thus moves along with the column. Such an arrangement can be helpful when a column is being moved more than one position (e.g., two or three positions to the left).

When the user is satisfied that the columns are moved to their desired positions, the save button 756 can be activated to save the changes. The user interface element 750 can support multiple step operations in that multiple columns can be moved or a single column can be moved multiple positions before the save button 756 is pushed.

Performing multiple step operations need not be limited to moving columns. For example, multiple column rename operations could be performed via a user interface element for renaming column operations. Such a user interface element might have a save button similar to the save button 756.

Alternatively, the move column user interface element 750 could be implemented to immediately perform the column moves, rather than batching them as described above. In yet another arrangement, a user interface element 750 can be implemented so that the action is performed in response to detecting that the element 750 has been moved off the selected item. For example, multiple rename column operations could be performed by a user interface element that renames the column (e.g., to whatever name is specified via a text box within the element) when the element is dragged off a current column.

FIG. 8A depicts a delete column user interface element 800. The user interface element 800 is used to delete a column in a list. Two areas 802A and 802B are provided to automatically move the element 800 to the neighboring left or right column, respectively. For example, if a column is currently selected, pressing the area 802A causes the user interface element to move one column to the left and select the column. For other elements, a similar arrangement can be used to move to a next displayed item (e.g., in a logical order).

FIG. 8B depicts a format column user interface element 850, which is identified by and can be dragged via name area 862. When the pointer 864 of the format column user interface element 850 is positioned over a column, the formatting controls 872 are updated to reflect the formatting settings of the column. The user can then manipulate the formatting controls 872 to modify the formatting of the column. When the user is satisfied with the settings, the OK button 884 can be activated, or the formatting can be canceled and the element dismissed by clicking on the cancel button 886. An alternative format column user interface element includes a ruler (e.g., such as that displayed in a word processor program for setting tabs and margins) for formatting text.

To streamline processing, the format column user interface element 850 can be configured to not display information about a column until it has reached a standstill (e.g., when the user has completed a drag operation). For example, the user interface element 850 can be reduced in size to hide the formatting controls 872. The formatting controls 872 are thus not updated as the element is dragged about the display.

Although the above-described examples involve cases in which an operation is performed directly on a column, operations can also be performed with reference to a selected item. For example, an “add column” operation might not perform an operation on the selected column but rather add a column after or before the selected column. Alternatively, a “duplicate column” operation might duplicate (e.g., copy) an already-existing column.

The above user interface elements are meant to be exemplary only. A wide variety of others can be constructed in accordance with the invention. For example, a moveable displayed user interface element could be used to modify the properties of any displayed item. Such properties might include, without limitation, size, color, shape, name, location, settings, and the like.

Lightweight Selection System and Methods

FIG. 9 shows a system 900 for providing selection of items displayed in a user interface. The system is sometimes called “lightweight” because selection of items can be determined by consulting a region list, rather than the items themselves. On a general level, the system 900 determines when a moveable displayed item is positioned over any of a number of specified displayed items in a graphical user interface. Although the lightweight selection system and methods can be used to implement the various examples above, it is a generic solution. Therefore, the system and method can be modified to address a variety of other scenarios.

In the system 900, items that can be selected are sometimes called “targets.” Targets are selected whenever a moveable displayed item is positioned over a region associated with the target. Typically, a point on the moveable displayed item is designated a hot point. Whenever the hot point is within a region, the associated target is considered selected.

An internal representation 902 of the moveable displayed item is typically a software object having various data members and member functions. The software object can be constructed in any of a number of software development environments. In the example, the software objects are constructed via the JAVASCRIPT programming language of Sun Microsystems.

The software object 902 for tracking the moveable displayed item includes a hot point, which specifies a point (e.g., a pixel) that is used to determine when the moveable displayed item is positioned over one of the targets. The software object 902 also includes a reference to a representation 912 of the moveable displayed item and a reference to acquire and release functions of the representation 912 that are invoked when the moveable displayed item is moved into (i.e., “acquires”) or out of (i.e., “releases”) a target. The functions are sometimes called “call backs” because the actual functionality typically resides in another object. Such an arrangement is advantageous because the software object 902 is an object that invokes generic acquire and release functionality. Details of the acquire and release are handled elsewhere (e.g., via a region list) and thus can be customized more easily. Objects representing or tracking the moveable displayed item need only handle invoking the acquire and release functionality, rather than implementing it.

The software object 902 further includes a function CheckTarget( ), which can be invoked when the moveable displayed item is moved to determine whether the moveable displayed item is over a target and invoke the appropriate acquire function when it is determined that the moveable displayed item has selected or de-selected a target. For example, CheckTarget( ) can consult the region list and the hot point to determine over which region the moveable displayed item is located. Then, the selected target is determined by finding which target is associated with the region. As a result of a change in target status (e.g., a different target is now selected), the appropriate release or acquire functionality is invoked for the target.

The software object 902 further includes a reference to a region list, which is represented by a region list object 922. The region list object 922 includes a list of regions. For each region, the extents of the region (e.g., the area of the display considered to be within the region) and a reference to a target associated with the region is specified. The reference to the region list can be encapsulated in the CheckTarget( ) functionality. Thus, the region list handles the details relating to what happens when the moveable user interface enters a region. The region list is sometimes called “pluggable” because a new region list can be swapped for the current one while maintaining the object 902.

The region list object 922 also includes a member function FindTargetRegion( ), which, given a point on the display, can determine within which region, if any, the point lies. Typically, the regions are specified by rectangles, but a non-rectangular system can be used.

By supporting the “acquire target” and “release target” functions, the system and methods support a wide variety of implementations, including moveable displayed interface elements that are modified as they enter and leave other displayed items. The region and target arrangement supports a level of indirection in that the displayed regions may refer to a different item (e.g., a displayed region may be the word “all” and entering the region activates a target that selects all designated displayed items).

An advantage of the illustrated arrangement is that selection of a target can be determined by consulting a single object (i.e., the region list object 922), rather than consulting each of the targets 932, 934, 936, and 938. Another advantage is that a single object can be more easily updated when the extents of one or more targets change. Changes in the individual targets that make up a region list can be more quickly applied to determine new extents of a target.

A method for use in conjunction with the system 900 is shown in FIG. 10. At 1002, a moveable displayed item is created. A hot point for the item can be specified or a default one chosen. At 1004, various regions (e.g., associated with the targets) are registered with the moveable displayed item by constructing a region list for the moveable displayed item. Call back functionality can also be designated at this time.

At 1010, if it is determined the hot point associated with the moveable displayed item has indicates acquisition of a target (e.g., the hot point has entered a different region), at 1012, the acquire function of the moveable item (e.g., calling back to functionality of the region list) is invoked, and the particular region the displayed item has entered is provided to the acquire function. The region is typically associated with a particular target.

1010 can be implemented by a call to the FindTargetRegion( ) method of the region list object 922 (FIG. 9). In this way, selection can be determined without having to consult the individual potential targets. If there are many potential targets, such an approach can be considerably more efficient. The FindTargetRegion( ) method can be invoked by a member function CheckTarget( ) described above. One way of determining whether the hot point has entered a region is to check if the target associated with the current region is different from the target when last checked.

At 1020, if it is determined that the hot point indicates release of a target (e.g., the hot point has moved outside a region), at 1022, the release function of the moveable item (e.g., calling back to functionality of the region list) is invoked. Again, 1020 can be accomplished by consulting the region list object, rather than each of the individual potential targets.

Various other features can be incorporated into the lightweight selection system and method. For example, a set of functions can be specified that are called when an items begins or completes moving (e.g., when dragging begins and when dragging stops). Such functions allow for the modification of a moveable item while it is being moved. For example, it may be desirable to hide some detail of a moveable item while moved to improve performance.

Implementation of User Interface Elements Via Lightweight Selection System

The above-described lightweight selection system and methods can be used in a variety of scenarios and is particularly useful for implementing the above-described moveable displayed user interface elements. For example, a user interface element can be designated as a moveable displayed item, and a region list can be constructed to indicate each of the possible targets. When the user interface element is moved over one of the targets, a function is invoked to pass information about the associated region (and thus a reference to the target) to a software object associated with the user interface element. At such time, the software object associated with the user interface element can take any of a number of actions, including making a notation of the target over which the user interface element has been positioned.

To avoid excessive page recalculations and rendering, the passed information can be used to generate a highlighted region. The highlighted region can be presented in a variety of ways but is typically positioned over a target by denoting (e.g., filling) a region's extents with a particular color or graphic emphasis.

Subsequently, when the activation area of the user interface element is activated, a software object associated with the user interface element can perform its particular operation, with reference to the target associated with the region over which the user interface element has been positioned.

Further Details of an Implementation of a User Interface Element

FIG. 11 shows one of many environments suitable for an implementation of the invention. The environment includes a web site 1102 comprising a web server 1112, which accesses a database 1114. Typical web sites include a more complex arrangement in which several web servers access a plurality of databases hosted by a plurality of database servers.

The web site 1102 is accessed via a network 1122 (e.g., the Internet) by various devices 1130A, 1130B, and 1130C having a web-browsing capability. For example, the desktop computer 1130C presents a web page 1140 on its display device. The web page 1140 is typically presented by software called a web browser.

The depicted devices include computer-readable media such as a hard disk to provide storage of data, data structures, computer-executable instructions, and the like. Although the description of computer-readable media above refers to a hard disk, other types of media which are readable by a computer, such as a removable magnetic disks, CDs, magnetic cassettes, flash memory cards, digital video disks, and the like, may also be used in the exemplary operating environment.

In the illustrated example, a moveable displayed user interface element is implemented in Dynamic Hypertext Markup Language (“DHTML”). DHTML is a hypertext markup language supporting various features for building dynamic graphical user interfaces.

FIG. 12 is a block diagram showing details of one particular implementation of moveable displayed user interface elements, which are called “widgets” in the example. The document object 1204 is a DHTML document presented by a web browser and includes various functions created in the JAVASCRIPT programming language of Sun Microsystems. The showwidget( ) function can be invoked (e.g., via a call to “javascript:showWidget(‘delete_column’)) to display a widget for performing any of a variety of functions. In the example, the showWidget( ) function determines the appropriate targets for a widget and builds the region list object described below. One way of providing a way to invoke the showWidget( ) function is by including it in the “HREF” field of a link embedded in a displayed web page.

The widgetCheckTarget function checks to see if a widget is over a list of specified targets. When the pointer is moved about the web page, the onmousemove function of the document object 1204 is invoked. In the illustrated example, the onmousemove function is set to “widgetCheckTarget().” When the pointing device's button is released, the onmouseup function of the document object 1204 is invoked. In the illustrated example, the onmouseup function is set to “widgetStopDrago( )”

The widget object 1212 is used to represent a widget, and includes a checkTarget( ) function, which can be invoked by the above widgetCheckTarget( ) function to determine whether the widget is over any of a set of specified targets. The widgets function is a constructor that builds a widget object 1212 upon receipt of a region list, the DHMTL of the widget 1222, a hot point, an acquire function, a release function, and other information.

The hot point is an X,Y coordinate specifying a point within the widget (e.g., a tip of the widget). When the hot point is over a target, the widget selects the target.

The widgetObj refers to the DHTML of the widget 1222. DHTML supports an element called “DIV,” which specifies a container that renders HTML. The widget can be rendered via a DIV element. The onacquire( ) and onrelease( ) functions are invoked when the widget acquires or releases a target, respectively. Typically, these two functions call back to functionality via the region list object 1232, described in more detail below. When the widget acquires a target, the widget object 1212 can store information about the target. Subsequently, when the button associated with the widget is pressed, the widget object 1212 can perform an appropriate operation on the target. For example, in the DHTML of the widget 1222, an HTML form can include a submit button which invokes an appropriate command on a web server (e.g., the web server 1112 of FIG. 11). Thus, for example, an item stored at a server can be modified by directing an appropriate command, including modification information, to the server when the submit button is pressed.

The widget object 1212 also refers to a region list object 1232, which contains a list of regions 1240, references to associated targets, and functionality for acquiring and releasing targets. In the example, the regions 1240 are columns in a table, but other shapes with another set of extents could be used. The region list object 1232 includes the display extents of the regions, so that it can easily be determined whether a widget's hot point is over a region. In the example, the extents are specified as a set or sets of rectangular coordinates.

When the showwidget( ) function is activated, the function checks to see if a widget of the specified type has already been created and can thus be reused. If so, a new region list may need to be swapped in, but the same widget can be reused. If a widget is not already created, the function builds the widget by constructing the proper DHTML for it, including, for example, an HTML form which sends an appropriate command back to a web server when activated. After use, the widget can be hidden via its “visible” property. The “innerHTML” feature of DHTML can be used to add the widget to the DHTML already displayed (e.g., by substituting the constructed DHTML of a widget for an empty “DIV” element in the document). Upon selection of one of the targets, a rectangle over the appropriate region can be set to an opaque color to indicate the region has been selected.

Using the User Interface Elements to Customize a Web Page

A particularly useful scenario for the above-described moveable displayed user interface elements is web page customization. For example, if the display region of FIG. 5 is the rendered version of a web page stored at a server, the moveable displayed user interface elements can be presented at a client computer and used to customize (e.g., format) the page according to a user's preferences. The user can thus select items appearing in the rendered version of the web page and modify the data stored at the server that is used to render the web page.

Thus, an easy-to-understand interface for editing web pages is presented. If web pages are stored at a server, appropriate commands (e.g., formatting commands) are directed to the server so that presentation of the page is modified.

Customization of the web page can include deletions. For example, if a web page has a table with columns, a displayed user interface element (e.g., element 800 of FIG. 8A) can be positioned to select the column and the “delete” button pressed. Responsive to the delete button's being pressed, a directive is sent back to the server to delete the column from the presentation of the web page.

Such an approach is superior to an approach wherein the user indicates a delete command, and an additional mechanism (e.g., checkboxes) is inserted into the web page to indicate which column is to be deleted. In such a case, the web page must be redisplayed before the user can choose which column is to be deleted.

Alternatives

Having described and illustrated the principles of our invention with reference to illustrated embodiments, it will be recognized that the illustrated embodiments can be modified in arrangement and detail without departing from such principles. Although one of the illustrated embodiments involves operations performed on a list in table form, the principles of the architecture can be applied to a wide variety of scenarios involving displayed user interfaces. It should be understood that the programs, processes, or methods described herein are not related or limited to any particular type of computer apparatus, unless indicated otherwise. Various types of general purpose or specialized computer apparatus may be used with or perform operations in accordance with the teachings described herein. Elements of the illustrated embodiment shown in software may be implemented in hardware and vice versa. In view of the many possible embodiments to which the principles of our invention may be applied, it should be recognized that the detailed embodiments are illustrative only and should not be taken as limiting the scope of our invention. Rather, we claim as our invention all such embodiments as may come within the scope and spirit of the following claims and equivalents thereto. 

1-50. (canceled)
 51. A method of presenting a computer user interface for performing one of a plurality of operations on displayed items, the method comprising: receiving an indication that a particular function is to be performed on a displayed item; responsive to receiving the indication that a particular function is to be performed on the displayed item, displaying a moveable displayed user interface element for performing the particular function and configured to be dragged by a graphical pointer; responsive to determining that a hot point of the moveable displayed user interface element has been moved over the displayed item, selecting the displayed item; and responsive to receiving an activation indication, performing the particular function on the selected displayed item.
 52. The method of claim 51, further comprising: responsive to determining that the hot point of the moveable displayed user interface element has been moved off the displayed item, releasing the displayed item.
 53. The method of claim 51, wherein selecting the displayed item comprises highlighting the displayed item.
 54. The method of claim 51, wherein the moveable displayed user interface element comprises a button within the displayed user interface element.
 55. The method of claim 54, wherein receiving an activation indication comprises receiving an indication that the button has been pressed.
 56. The method of claim 51, wherein the moveable displayed user interface element comprises a text box within the displayed user interface element.
 57. The method of claim 51, wherein at least two displayed items are selected, and wherein responsive to receiving an activation indication further comprises causing the particular function to be performed on the at least two displayed items.
 58. A computer-implemented system for determining when a moveable displayed item is moved over one of a plurality of displayed regions to thereby select one of a plurality of potential targets, wherein the regions are associated with the targets, the system comprising: a region list data structure containing a list of the plurality of displayed regions; acquire-target functionality designated for execution when the moveable displayed item acquires a target; release-target functionality designated for execution when the moveable displayed item releases the target; and functionality operable to consult the region list data structure to determine whether a moveable displayed item enters or exits any of the regions and further operable to invoke the acquire-target and release-target functionality with respect to a target associated with a region into which or out of which the moveable displayed item enters or exits.
 59. The system of claim 58, wherein the region list data structure comprises a region list object.
 60. The system of claim 58, wherein the functionality operable to consult the region list data structure is operable to determine whether a hot point of the moveable displayed item is within any of the plurality of displayed regions.
 61. The system of claim 58, wherein the region list data structure contains, for each of the plurality of regions, information describing extents of the region, as well as a reference to a target associated with the region.
 62. The system of claim 58, wherein one or more of the plurality of displayed regions is associated with more than one target.
 63. The system of claim 58, further comprising functionality operable, upon receiving an indication to display a moveable displayed item, to display the indicated moveable displayed item.
 64. A computer-implemented method for determining over which of a set of potential targets displayed on a display a moveable displayed item has been dragged, the method comprising: assembling a list of regions corresponding to display regions associated with the potential targets; upon determining the moveable displayed item has been dragged to a location, consulting the list of regions to determine whether the moveable displayed item has been dragged over one of the potential targets; and upon determining the moveable displayed item has been dragged over one of the potential targets, taking an action with respect to the one of the potential targets.
 65. The method of claim 64, wherein the moveable displayed item comprises a hot point, and wherein consulting the list of regions comprises determining whether the hot point of the moveable displayed item has been dragged over one of the potential targets.
 66. The method of claim 64, wherein the action is selecting one of the potential targets.
 67. The method of claim 64, wherein the list of regions comprises a region list object.
 68. The method of claim 64, further comprising, upon receiving a request to display a user-selected moveable displayed item, displaying the moveable displayed item.
 69. The method of claim 64, wherein consulting the list of regions comprises determining that the moveable displayed item has been dragged over two or more potential targets.
 70. The method of claim 69, wherein taking an action with respect to the one of the potential targets comprises taking an action with respect to the two or more potential targets. 